Chain pipe-wrench



(No Model.)

J. H. NEWELL.

OHAIN PIPE WRENCH.

No. 530,547. Patented 'Dec. 11, 1894.

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JOHN H. :NEWELL, or HURLEY,WISCONSIN.

CHAIN FIRE-WRENCH.

SPEGIFIG ATIQN forming'part of Letters Patent No. 530,547, dated December 1 1, 1 894. Application filed February 20,1894- Seriitl No. 500,898- (No model.)

.To all whom it may concern:

Be it knownthat 1, JOHN I-Iorrr NEWELL, a citizen of the United Statesof America, and

a resident of Hurley, in the State of Wisconsin, have invented a new anduseful Improvement in Chain Pipe-Wrenches, of which the following is a specification.

This invention relates to those chain pipewrenches in which a take-uporadjusting device is combined with the chainfand hand-leverso asto tighten the-chain. around pipes of difierent sizes to the. most advantageous extent; and the present invention consists primarily in an improved takekup of peculiar construction, comprising an axial s'crewand a nut,both of which aredistinct from the handlever of the wrench, anda hook or hooks, coupled to said screw, acting-simultaneously on th ends of the chain, and thusad'j'usting the latter with double speed as compared with; 1 a single-acting take-u p havinga screw of like pitch. This invention further consists in so constructing the take-up screw and its nut as to prevent any dust or dirt getting into the threads of said screw ateither end of the nut, and, at the same time, to supportboth ends;

\ of the nut by pivotal bearings.

The invention consistszfurther in pivoting thetake-up hooks tothe take-upscrew so that i the lever can swing back and forth to bring the toothed heel or fluting and the smooth tool of its foot alternately-into contact with the pipe without moving its chain, and consequently with greater case; also in the combination of a stop with swingingihooks ina pement of the lever; and finally inalever havculiarmanner, and in making such stop adjustable, and ina peculiarly constructed adjustable stop for the purpose, to limit and vary the extent of such independent moveit ing a foot which projects symmetrically in opposite directions, incombination with a double-acting'take-up andatake-up screw in line with the longitudinal axis of the lever.

A sheet of drawings accompanies this specification as part thereof.

Figure'1 of the drawings is a small scale side elevation of the improved wrench, illustrating its ;application to a pipe, represented in cross section. Fig. 2 is anelevation of the working end of the wrench with-the chain detached-and one side-plate removed to expose to view the inner parts. Fig. 3 repre sents a longitudinal section through the lever, including both its side-plates, and through the take up hooks, onthe line 3 -3 Fig. 2;. and Figs. 4 and 5 are perspective views showing one of the tinting-pieces and the take-up stop detached.

Like letters and numbers indicate corresponding parts in all the figures.

I The improvedchain-tongs. or pipe-wrench is composed of a hand-lever A and atake-up B, both of novel constructionytogether with achaln C, for which a flat band may be sub stituted to provide for manipulating pipe's and rods of polished metal, and which for the purposes of this invention maybe of any suitable kind.

. i The hand-leverA comprises abody-portion, 1, and a bifurcated foot-portion; the latter having sides, 2, 3, parallel with each other in the plane in which the wrench swings,and terminating in heel-projections 4: and toe-proj ections 5, which extend symmetricallyon oppositesides of. the longitudinal axis of the lever. Said heel-projections 4 are provided with renewable fiutingpieces 6,0ne of which is shown detached by Fig. at, and each of these fluting-pieces has on its back a tenon 7,1Fig.

4, perforated for the reception of a locking pin 8,Fig. 2,while each heel-projection is recessed and perforated to receive and tightly "hold a tinting-piece and its-locking pin; its

main recess, fitted to the body of the dating piece, extending to the extremity of the projection, as at 9 Fig. 2, so as to facilitate detaching worn fiutingspieces, while its inner end 10 is undercut and located in the direction of greatest strain to securely hold and support the attached fluting-piece.

In practice, thehand-lever'Amay be forged or cast in a single piece,apart fromsaid flut- Ling-pieces 6, locking pins .8, and one or both of the sides 2 and 3. In the. drawings both of the latter are formed by side-plates 2 and '3 'attachedto' the body-portion 1 by screws or bolts, as in Fig. 1, and one of said side plates is omitted in Fig. 2.

A short axial bore, in the end of the bodyportion 1 of the hand-lever toward the toe, accommodates within it a pivotal support a for the screw 11 and nut 12 of the take-up B, and a through recess accommodates said nut. The milled periphery of this nut projects in customary manner beyond the sides of the lever. Said pivotal supporta is formed on a closed end of the nut; a pivotal support?) at its other end is formed bya cylindrical sleeveextension of the nutwithin the recess between said parallel sides 2 and 3 of the lever; and the chamber of the nut, so'extended, incloses at all times the threaded portion a of the screw 11 so as to exclude dust and dirt from the screw-threads; a cylindrical portion (1 of the shank of the screw fitting snugly within the nut-extension b when the screw is projected to the fullest extentrequired in practice. Said recess between the parallel sides 2 and 3 of the lever further accommodates within it the take-up hook or hooks 13, which are hinged to the head of the take-up screw by a pivot 14:, Fig. 2, and also a stop 15 by which the swinging movement of said hook or hooks independently of the lever is limited. Two fiat hooks are shown in the drawings. They may in practice be united. In either case they project at both edges of the foot-end of the lever, and engage with both ends of the chain 0, so to provide for simultaneously adjusting both ends thereof as aforesaid.

To engage with the stop 15, the take-up hooks 13 have a pair of shoulders 16 which are conveniently formed by a deep notch; and the stop is rendered adjustable to vary the independent swing of the hooks by the following construction thereof, which is illustrated by Fig. 5: The stop is composed of a screw 17, having a head at one end, and a sleeve 18, oblong in cross-section, made fast upon the screw, between the sides 2 and 3 of the foot end of the lever A, by a pin 19 or its equivalent. By giving the screw 17 a quarter turn in either direction, the independent swing of the hooks is increased or lessened, as may be required to regulate the action of the wrench. See dotted lines in Fig. 2.

The preferred construction of chain, represented at 0, comprises edge-opposing fiat links 20 and transverse pintles 21; both ends of some of the latter projecting beyond the side-links at both ends of the chain to en- 'gage with the take-up hooks 13, which pronut for the take-up B, in place of the screw 11 and peculiarly constructed nut 12 above described; and both of the sides 2 and 3 of the lever may in that case be integral with its body-portion, the latter being provided with a longitudinal bore to accommodate the screw while the nut turns upon the screw without other pivotal support, in customary manner; and other like modifications will suggest themselves to those skilled in the art.

Having thus described the said improvement, I claim as my invention and desire to patent under this specification- 1. In a chain pipe-wrench, the combination of a hand-lever having an axial bore and recesses at the respective ends of said bore, a take-up nut/within one of said recesses, a takeup screw partly within said nut and said bore, a movable hook or hooks within the other of said recesses acted on by said screw, and a chain both ends of which are acted on simultaneously by said hook or hooks, substantially as hereinbefore specified.

2. The combination with the hand-lever and with the take-up screw of a take-up nut having a closed end provided with a pivotal support and a sleeve-extension at its opposite end forming a second pivotal support, said lever having an axial bore and recesses fitted to said nut and its pivotal supports, and said screw having a cylindrical portion working snugly within said sleeve-extension, and cooperating with the nutto exclude dust and dirt from the screw-threads, substantially as hereinbefore specified.

3. The combination with the hand-lever, the chain, and the take-up screw carried by the lever, of a hook or hooks common to both ends of the chain and hinged to said take-up screw by a pivot which provides for a limited swinging movement of the lever independent of said hook or hooks, substantially as hereinbefore specified.

4.. In combination with the hand-lever, the chain, and the take-up screw, a hook or hooks, common to both endsof the chain, hinged to the take-up screw and provided with stop shoulders, and a stop carried by the lever and interposed between said shoulders, substantially as hereinbefore specified.

5. In combination with the hand-lever, the chain, and the take-up screw, a hook or hooks, common to both ends of the chain, hinged to the take-up screw, and provided with stopshoulders, and an adjustable stop carried by the lever and interposed between said shoulders, substantially as hereinbefore specified.

6. The combination with the hand-lever, the chain, and the take-up screw, of a hook or hooks, common to both ends of the chain, pivoted to said screw, and provided with stopshoulders, and an adjustable stop, interposed between said shoulders, consisting of a screw carried by the lever, and a sleeve oblong in cross-section and movable into difierent positions by turning the screw last named, subaxis of the lever, substantially ashereinbe stantially as hereinbefore specified.

7. In a chain pipe-wrench, a. hand-lever having a foot which projects symmetrically 5 in opposite directions, in combination with a Witnesses:

double-acting take-up hook or hooks and. a. take-up screw in line with the longitudinal fore specified.

J. H. NEWELL.

GEO. C. FOSTER, F. H. BUSHNELL. 

